/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.sedona.sql.datasources.osmpbf;

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;
import org.apache.sedona.sql.datasources.osmpbf.build.Fileformat;

public class ParseUtils {
  public static DataInputStream dataInputStreamBlob(Fileformat.Blob blob)
      throws DataFormatException {
    if (!blob.getRaw().isEmpty()) {
      return new DataInputStream(new ByteArrayInputStream(blob.getRaw().toByteArray()));
    }

    if (!blob.getZlibData().isEmpty()) {
      Inflater inflater = new Inflater();
      inflater.setInput(blob.getZlibData().toByteArray());
      byte[] decompressedData = new byte[blob.getRawSize()];
      inflater.inflate(decompressedData);
      inflater.end();
      return new DataInputStream(new ByteArrayInputStream(decompressedData));
    }

    throw new RuntimeException("Data not found even compressed.");
  }
}
